GPT-5.6 Sol vs Claude Opus 4.8: side-by-side summary

GPT-5.6 Sol and Claude Opus 4.8 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Sol, from OpenAI, has a 1,050,000-token context window and is priced at $5/M tokens input, $30/M tokens output on OpenRouter.

Claude Opus 4.8, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

Context window

• GPT-5.6 Sol: 1,050,000 tokens
• Claude Opus 4.8: 1,000,000 tokens

Price

• GPT-5.6 Sol: $5/M tokens input, $30/M tokens output
• Claude Opus 4.8: $5/M tokens input, $25/M tokens output

Provided by

• GPT-5.6 Sol: OpenAI
• Claude Opus 4.8: Anthropic

• GPT-5.6 Sol model details, providers and pricing
• Claude Opus 4.8 model details, providers and pricing